Prefer set_data when setting polygons and vertices.

modules/navigation/3d/nav_mesh_generator_3d.cpp

@@ -939,7 +939,6 @@ void NavMeshGenerator3D::generator_bake_from_source_geometry_data(Ref<Navigation
 			nav_polygons.push_back(nav_indices);
 		}
 	}
-	p_navigation_mesh->set_polygons(nav_polygons);
 
 	p_navigation_mesh->set_data(nav_vertices, nav_polygons);
 

scene/resources/2d/tile_set.cpp

@@ -6502,16 +6502,19 @@ Ref<NavigationPolygon> TileData::get_navigation_polygon(int p_layer_id, bool p_f
 		transformed_polygon.instantiate();
 
 		PackedVector2Array new_points = get_transformed_vertices(layer_tile_data.navigation_polygon->get_vertices(), p_flip_h, p_flip_v, p_transpose);
-		transformed_polygon->set_vertices(new_points);
 
-		transformed_polygon->set_polygons(layer_tile_data.navigation_polygon->get_polygons());
+        transformed_polygon->set_data(new_points, layer_tile_data.navigation_polygon->get_polygons());
+
+        const Vector<Vector<Vector2>> outlines = layer_tile_data.navigation_polygon->get_outlines();
+		int outline_count = outlines.size();
 
-		int outline_count = layer_tile_data.navigation_polygon->get_outline_count();
 		Vector<Vector<Vector2>> new_outlines;
 		new_outlines.resize(outline_count);
+
 		for (int i = 0; i < outline_count; i++) {
-			new_outlines.write[i] = get_transformed_vertices(layer_tile_data.navigation_polygon->get_outline(i), p_flip_h, p_flip_v, p_transpose);
+			new_outlines.write[i] = get_transformed_vertices(outlines[i], p_flip_h, p_flip_v, p_transpose);
 		}
+
 		transformed_polygon->set_outlines(new_outlines);
 
 		layer_tile_data.transformed_navigation_polygon[key] = transformed_polygon;

scene/resources/3d/importer_mesh.cpp

@@ -1101,8 +1101,7 @@ Ref<NavigationMesh> ImporterMesh::create_navigation_mesh() {
 
 	Ref<NavigationMesh> nm;
 	nm.instantiate();
-	nm->set_vertices(vertices);
-	nm->set_polygons(face_polygons);
+	nm->set_data(vertices, face_polygons);
 
 	return nm;
 }